fix(logging): Include runtime identifier in per-test logfile name and sanitize runtime string

ts/tstest.logging.ts

@@ -200,15 +200,18 @@ export class TsTestLogger {
         .replace(/\//g, '__') // Replace path separators with double underscores
         .replace(/\.ts$/, '') // Remove .ts extension
         .replace(/^\.\.__|^\.__|^__/, ''); // Clean up leading separators from relative paths
-      
-      this.currentTestLogFile = path.join('.nogit', 'testlogs', `${safeFilename}.log`);
-      
+
+      // Sanitize runtime name for use in filename (lowercase, no spaces/dots/special chars)
+      const safeRuntime = runtime.toLowerCase().replace(/[^a-z0-9]/g, '');
+
+      this.currentTestLogFile = path.join('.nogit', 'testlogs', `${safeFilename}__${safeRuntime}.log`);
+
       // Ensure the directory exists
       const logDir = path.dirname(this.currentTestLogFile);
       if (!fs.existsSync(logDir)) {
         fs.mkdirSync(logDir, { recursive: true });
       }
-      
+
       // Clear the log file for this test
       fs.writeFileSync(this.currentTestLogFile, '');
     }